A trigger attachment for a game controller having a housing, a trigger extending through the housing with an exposed contact surface and operable through a trigger range of motion between a zero position and an end position, and an additional button spaced from the trigger by a housing spacer. The trigger attachment has an attachment body defining a recess with a receiving face shaped to mate with the finger contact surface of the trigger, a sloped outer front surface, an upper surface, and a lower housing contact surface. The attachment body is sized and shaped to be mounted on the trigger with the trigger's receiving face against the finger contact surface. When mounted on the trigger, the lower housing contact surface is positioned to abut the housing when the trigger is pressed to reduce the trigger range of motion by preventing the trigger from fully achieving the end position.